Cooling device of battery pack

Abstract

A battery pack including battery cells, a housing to house the battery cells, and a cooling device that cools air flowing through the housing. The cooling device may be installed on an intermediate portion of the housing. The cooling device may include a cooling pipe, in which water flows.

What is claimed is: 
     
       1. A battery pack comprising:
 battery cells; 
 a housing to house the battery cells; 
 an inlet formed on a front portion of the housing, through which air is injected to cool the battery cells; 
 an outlet formed on an opposing rear portion of the housing, through which the air is discharged; and 
 a cooling device disposed at an intermediate portion inside the housing to contact the injected air inside the housing and to cool the injected air inside the housing, 
 wherein the cooling device comprises: 
 a cooling pipe through which a fluid flows, to absorb heat from the injected air inside the housing; 
 a pump to pump the fluid through the cooling pipe; and 
 a storage tank connected to the cooling pipe, to store the fluid. 
 
     
     
       2. The battery pack of  claim 1 , wherein:
 the cooling device is disposed at the intermediate portion of the housing between the front portion having at least one battery and the rear portion having at least one battery. 
 
     
     
       3. The battery pack of  claim 2 , wherein the cross-sectional area of the intermediate portion is smaller than the cross-sectional area of the front portion.